#include<bits/stdc++.h>
using namespace std;
 
#define debug(x) cerr << #x << ": " << (x) << endl
#define rep(i,a,b) for(int i=(a);i<=(b);i++)
#define dwn(i,a,b) for(int i=(a);i>=(b);i--)
#define pb push_back
#define all(x) (x).begin(), (x).end()
 
#define x first
#define y second
using pii = pair<int, int>;
using ll = long long;
 
inline void read(int &x){
    int s=0; x=1;
    char ch=getchar();
    while(ch<'0' || ch>'9') {if(ch=='-')x=-1;ch=getchar();}
    while(ch>='0' && ch<='9') s=(s<<3)+(s<<1)+ch-'0',ch=getchar();
    x*=s;
}

signed main(){
	string t; cin>>t;
	rep(i, 1, 7){
		string s; cin>>s;
		if(s==t){
			puts("WINNER");
			return 0;
		}
		else if(i==7){
			puts("LOSER");
			return 0;
		}
		
		rep(j, 0, 4){
			if(s[j]==t[j]) cout<<"G";
			else if(~t.find(s[j])) cout<<"Y";
			else cout<<"X";
		}
		puts("");
	}
	
	return 0;
}